skull session

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A meeting, as of executives or advisers, for discussing strategy or policy.
• noun A meeting of the members of an athletic team for instruction in plays or strategy.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a session (as of executives or advisors) to discuss policy or strategy or to solve problems or exchange ideas
• noun teaching strategy to an athletic team